Self - assembly of HgTe nanoparticles into nanostars using single stranded DNA

Details Self - assembly of HgTe nanoparticles into nanostars using single stranded DNA Self - assembly of HgTe nanoparticles into nanostars using single stranded DNA

2004-03-06

arxiv.org/abs/cond-mat/0403186v1

Physics

Condensed Matter

Materials Science

10 pages, 1 figure

Scientific paper

Self-assembly of structurally tunned nearly monodispersed HgTe - ssDNA nanostars of average size 1.4 nm have been achieved by manipulating HgTe nanoparticles using single stranded (ss) DNA under galvanostatic condition. The nanostars are linked with one another by ssDNA of length 0.35 nm. Whereas, HgTe nanoparticles without ssDNA complexation show a polycrystalline character with size in the range 4 - 7 nm. Room temperature photoluminescence (PL) of HgTe - ssDNA nanostars have yielded a single narrow PL at 548.4 nm of width 8 nm that corroborates to the nearly monodispersity of the nanostars and predicts the lateral exciton transfer. On the other hand, polydispersed HgTe nanoparticles exhibit free- and bound- exciton dominated luminescence in their PL spectrum.

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